SLAAEI7 December   2023 MSPM0C1105 , MSPM0C1106 , MSPM0G1106 , MSPM0G1107 , MSPM0G1506 , MSPM0G1507 , MSPM0G1518 , MSPM0G1519 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0G3518 , MSPM0G3518-Q1 , MSPM0G3519 , MSPM0G3519-Q1 , MSPM0H3216

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Technology
    1. 2.1 Analog Peripherals in the MSPM0
    2. 2.2 Instrumentation Amplifier - INA350
    3. 2.3 Voltage Reference - REF2925
    4. 2.4 Low-Dropout Regulator - TPS7B6933-Q1
  6. 3Signal Chain
  7. 4Results
    1. 4.1 Influence of the OPA Chopping Mode
    2. 4.2 Oversampling and Hardware Averaging
    3. 4.3 Effect of Sampling Rate on Effective Resolution
    4. 4.4 Influence of the Amplification Factor
  8. 5Summary
  9. 6References

Abstract

Sensing signals in the single-digit millivolt range for industrial field transmitters is challenging. This application note highlights a cost-effective, integrated, high-gain sensor front end using the analog peripherals of the MSPM0 and minimal external components. The document presents an example signal chain and resulting measurement outcomes. Additionally, special hardware and software design considerations are examined.